AIEEE 2007 | Atoms and Nuclei Question 217 | Physics

The half-life period of a ratio-active element $$X$$ is same as the mean life time of another ratio-active element $$Y.$$ Initially they have the same number of atoms. Then

$$X$$ and $$Y$$ decay at same rate always

$$X$$ will decay faster than $$Y$$

$$Y$$ will decay faster than $$X$$

$$X$$ and $$Y$$ have same decay rate initially

AIEEE 2007

MCQ (Single Correct Answer)

-1

Which of the following transitions in hydrogen atoms emit photons of highest frequency ?

$$n = 1$$ to $$n=2$$

$$n = 2$$ to $$n=6$$

$$n = 6$$ to $$n=2$$

$$n = 2$$ to $$n=1$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

An alpha nucleus of energy $${1 \over 2}m{v^2}$$ bombards a heavy nuclear target of charge $$Ze$$. Then the distance of closest approach for the alpha nucleus will be proportional to

$${v^2}$$

$${1 \over m}$$

$${1 \over {{v^2}}}$$

$${1 \over {Ze}}$$

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